We have some old uni friends staying with us while one of them finishes off his PhD and hands it in.
They're good friends so we're happy to have them, particularly as we have space to not all end up in each other's hair.
But they're really feral, and annoyingly free and easy with our stuff. They have their kitchen stuff with them, so we could just not worry, but they're destroying all of ours...
They've scratched the surface off all of our pots and pans, despide DS (4) helpfully handing them wooden spatulas rather than metal spoons (not under instructions from me, though GAAAAH it certainly could be)... they sometimes do their dishes, but only after they've been sitting by the sink for 5 days, covered in food and flies... they sometimes even do some of our dishes, by chucking everyting into the sink with cold water and then taking it out again (usually with a few glasses and mugs broken - of course always our glasses and mugs) and dumping it in pools of food-filled greasy cold water on the kitchen table. They seem to like using plates that have a pre-coating of food... and the wife keeps pointedly telling the husband to WASH THE DETERGENT OFF THE DISHES because she can't stand soapy plates.... it's not soap on those plates!
These people are professionals, in their 30s, one of them is a medic.... it's not like they've never heard of hygiene!
How do I politely get it across to them that they're being really annoyingly feral?
Grrrrrrr....